John Davidson

Message:

I am dynamically generating forms in Symfony 6. From the controller, I am calling a Form Type class in the traditional method. Therein, I am dynamically building some form fields based on the elements of the $options passed to the FormType class.

<?php

    public function index(Request $request): Response

    {



    // Entity is called Breed

    $data = new Breed();



    // I am passing these $options to the form

    $options = [

            'form_1'          => true,

            'form_2'          => false,

            'units'           => 'pounds'

            'form_3'          => false,

        ];



    $form = $this->createForm(BreedSurveyType::class, $data, $options);

    

?>

In the BreedSurveyType form class, I am able to get my variables where I declare them in the configureOptions method...

<?php

 public function configureOptions(OptionsResolver $resolver): void

    {

        $resolver->setDefaults([

            'data_class' => Breed::class,

            'form_1'          => false,

            'form_2'          => false,

            'units'           => null

            'form_3'          => false,

        ]);

    }

?>

In the buildForm method, I can access the $options, but I cannot if I embed a sub-form.

<?php

 public function buildForm(FormBuilderInterface $builder,array $options): void 

{

        // form_1          =   true

        // form_2          =   false

        // units           =  'pounds'

        // form_3          =   true



        if ($options['form_1'] === true) {

            

            $builder

                ->add(

                    'name',

                    AnimalNameType::class

                );

        }



        if ($options['form_2'] === true) {

            

            $builder

                ->add(

                    'sex',

                    AnimalSexType::class

                );

        }



        if ($options['form_3'] === true) {

            

            $builder

                ->add(

                    'weight',

                    AnimalWeightType::class

                );

        }

?>

.... in the parent-form, when I dump the $options variable,

array:59 [▼

  // snippet from web debug toolbar

  "form_1" => true

  "form_2" => false

  "units"  => "pounds"

  "form_3" => true

]

.... in the sub-form, when I dump the $options variable, I get the results from the declarations I made in the configureOptions method.

array:59 [▼

  // snippet from web debug toolbar

  "form_1" => false

  "form_2" => false

  "units"  => null

  "form_3" => false

]

Effectively, is there a method to pass $options to a subform or do I need to isolate my logic of the dynamically created form in my BreedSurveyType class?

---

My Answer:
In Symfony, when you embed a subform within a parent form, the options passed to the parent form are not automatically passed down to the subform. If you need to access the options in the subform, you have a few options:

1. Pass the options explicitly to the subform when adding it in the parent form's buildForm method:
php
$builder
->add(
'name',
AnimalNameType::class,
['form_1' => $options['form_1']]
);


2. Use event listeners or form events to dynamically modify the subform based on the options passed to the parent form.

3. If the logic for dynamically creating the subform is complex and tightly coupled with the parent form, you may consider isolating that logic within the parent form's buildForm method.

Overall, the best approach will depend on the specific requirements of your application and the complexity of the form structure.